pdf (See attachment)• Understanding_Cryptography_Chptr_8—Discrete_Logarithm.pdf (See attachment)• Understanding_Cryptography_Chptr_13—Key_Establishment.pdf (See attachment)Video • One Time Padhttps://youtu.be/FlIG3TvQCBQ?t=6• Block and stream ciphershttps://youtu.be/E_3M41NrtsU• The public key and symmetric key operationshttps://youtu.be/ERp8420ucGsPaper Requirement• Please follow APA guidelines for all assignments, which includes the bibliography and in-text citations. This is a Master’s level course, so please put in the effort to make your papers the best they can be. Proof reading goes a long way in catching spelling and grammatical errors.• Please do not plagiarize the works of others; give credit for works cited. Also, do not attempt to turn in a paper you have previously written for another class! ————————————————-Week 4 Assignment: Why is Key Establishment important? (2 pages)While we outline in the teaching module and readings the technical elements of key establishment for encryption…what is it about key establishment that makes it so fundamentally important? Is it the method itself, the management of the key, the flexibility of the process, the protocols? Just how and why is key establishment a vital element of modern encryption?